/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:42:57,780 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:42:57,784 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:42:57,810 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:42:57,810 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:42:57,812 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:42:57,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:42:57,815 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:42:57,817 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:42:57,818 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:42:57,819 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:42:57,821 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:42:57,821 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:42:57,822 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:42:57,824 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:42:57,825 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:42:57,826 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:42:57,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:42:57,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:42:57,831 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:42:57,833 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:42:57,834 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:42:57,835 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:42:57,836 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:42:57,839 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:42:57,839 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:42:57,840 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:42:57,841 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:42:57,844 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:42:57,851 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:42:57,852 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:42:57,853 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:42:57,855 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:42:57,856 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:42:57,858 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:42:57,858 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:42:57,859 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:42:57,859 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:42:57,859 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:42:57,861 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:42:57,863 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:42:57,864 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 21:42:57,927 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:42:57,927 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:42:57,929 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:42:57,929 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:42:57,930 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:42:57,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:42:57,930 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:42:57,930 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:42:57,930 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:42:57,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:42:57,931 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:42:57,931 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:42:57,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:42:57,932 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:42:57,932 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:42:57,932 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:42:57,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:42:57,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:42:57,933 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:42:57,933 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:42:57,933 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:42:57,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:42:57,934 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:42:57,935 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:42:57,935 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:42:57,935 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:42:57,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:42:57,936 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:42:57,936 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:42:57,936 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:42:58,454 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:42:58,481 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:42:58,487 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:42:58,490 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:42:58,490 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:42:58,491 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label40.c [2020-09-24 21:42:58,571 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af7995b27/97dbd7e0552b40f4bb0c2e413c1f1f9d/FLAG45519d58b [2020-09-24 21:42:59,226 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:42:59,227 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label40.c [2020-09-24 21:42:59,243 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af7995b27/97dbd7e0552b40f4bb0c2e413c1f1f9d/FLAG45519d58b [2020-09-24 21:42:59,452 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/af7995b27/97dbd7e0552b40f4bb0c2e413c1f1f9d [2020-09-24 21:42:59,464 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:42:59,470 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:42:59,472 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:42:59,472 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:42:59,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:42:59,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:42:59" (1/1) ... [2020-09-24 21:42:59,483 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aa107a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:59, skipping insertion in model container [2020-09-24 21:42:59,483 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:42:59" (1/1) ... [2020-09-24 21:42:59,492 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:42:59,552 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:43:00,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:43:00,046 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:43:00,252 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:43:00,275 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:43:00,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:00 WrapperNode [2020-09-24 21:43:00,276 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:43:00,276 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:43:00,277 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:43:00,277 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:43:00,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:00" (1/1) ... [2020-09-24 21:43:00,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:00" (1/1) ... [2020-09-24 21:43:00,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:00" (1/1) ... [2020-09-24 21:43:00,311 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:00" (1/1) ... [2020-09-24 21:43:00,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:00" (1/1) ... [2020-09-24 21:43:00,377 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:00" (1/1) ... [2020-09-24 21:43:00,388 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:00" (1/1) ... [2020-09-24 21:43:00,394 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:43:00,394 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:43:00,395 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:43:00,395 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:43:00,396 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:00" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:43:00,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:43:00,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:43:00,470 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:43:00,471 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:43:00,471 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:43:00,471 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:43:00,471 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:43:00,471 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:43:00,472 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:43:00,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:43:00,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:43:01,809 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:43:01,809 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:43:01,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:43:01 BoogieIcfgContainer [2020-09-24 21:43:01,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:43:01,820 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:43:01,820 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:43:01,824 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:43:01,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:42:59" (1/3) ... [2020-09-24 21:43:01,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@738fd0a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:43:01, skipping insertion in model container [2020-09-24 21:43:01,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:00" (2/3) ... [2020-09-24 21:43:01,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@738fd0a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:43:01, skipping insertion in model container [2020-09-24 21:43:01,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:43:01" (3/3) ... [2020-09-24 21:43:01,829 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label40.c [2020-09-24 21:43:01,840 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:43:01,851 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:43:01,874 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:43:01,910 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:43:01,911 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:43:01,911 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:43:01,911 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:43:01,911 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:43:01,911 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:43:01,911 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:43:01,911 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:43:01,945 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-24 21:43:01,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-09-24 21:43:01,965 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:01,966 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:43:01,967 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:01,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:01,975 INFO L82 PathProgramCache]: Analyzing trace with hash 632775426, now seen corresponding path program 1 times [2020-09-24 21:43:01,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:01,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387569950] [2020-09-24 21:43:01,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:02,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:02,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:02,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:03,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:05,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:05,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:07,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:07,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-09-24 21:43:07,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 21:43:07,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-09-24 21:43:07,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:07,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:43:07,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 21:43:07,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 21:43:07,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 21:43:07,803 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-09-24 21:43:07,977 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2020-09-24 21:43:08,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:43:08,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:08,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:08,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:08,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:43:08,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:08,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-09-24 21:43:08,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:08,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:43:08,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:43:08,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:43:08,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:43:08,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:43:08,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387569950] [2020-09-24 21:43:08,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:43:08,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-09-24 21:43:08,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157546756] [2020-09-24 21:43:08,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:43:08,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:43:08,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:43:08,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:43:08,749 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 16 states. [2020-09-24 21:43:09,124 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-09-24 21:43:09,267 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-09-24 21:43:09,462 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-09-24 21:43:09,781 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 98 [2020-09-24 21:43:10,088 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 95 [2020-09-24 21:43:10,737 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2020-09-24 21:43:11,209 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 91 [2020-09-24 21:43:12,368 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 86 [2020-09-24 21:43:12,585 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2020-09-24 21:43:12,887 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-09-24 21:43:13,601 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2020-09-24 21:43:14,017 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 66 [2020-09-24 21:43:14,252 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-09-24 21:43:15,312 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-09-24 21:43:15,744 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-09-24 21:43:18,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:43:18,229 INFO L93 Difference]: Finished difference Result 1870 states and 2662 transitions. [2020-09-24 21:43:18,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-24 21:43:18,232 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 115 [2020-09-24 21:43:18,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:43:18,262 INFO L225 Difference]: With dead ends: 1870 [2020-09-24 21:43:18,262 INFO L226 Difference]: Without dead ends: 1241 [2020-09-24 21:43:18,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=469, Invalid=1171, Unknown=0, NotChecked=0, Total=1640 [2020-09-24 21:43:18,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2020-09-24 21:43:18,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1076. [2020-09-24 21:43:18,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1076 states. [2020-09-24 21:43:18,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1294 transitions. [2020-09-24 21:43:18,408 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1294 transitions. Word has length 115 [2020-09-24 21:43:18,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:43:18,409 INFO L479 AbstractCegarLoop]: Abstraction has 1076 states and 1294 transitions. [2020-09-24 21:43:18,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:43:18,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1294 transitions. [2020-09-24 21:43:18,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-09-24 21:43:18,427 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:18,427 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:43:18,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:43:18,430 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:18,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:18,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1790276128, now seen corresponding path program 1 times [2020-09-24 21:43:18,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:18,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287135163] [2020-09-24 21:43:18,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:18,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:18,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:18,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:18,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:18,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:19,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:20,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:20,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:21,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:22,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:23,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:23,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:23,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-09-24 21:43:23,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 21:43:23,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-09-24 21:43:23,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:23,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:43:23,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:43:23,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-24 21:43:23,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-09-24 21:43:24,314 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-09-24 21:43:24,434 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2020-09-24 21:43:24,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:43:24,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:24,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:24,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:24,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:43:24,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:24,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-09-24 21:43:24,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:24,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:43:24,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:43:24,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:43:24,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:43:24,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:43:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:24,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:24,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:24,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:43:24,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:24,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-09-24 21:43:24,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:24,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:43:24,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:43:24,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:43:24,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:43:25,340 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:43:25,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287135163] [2020-09-24 21:43:25,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:43:25,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 21:43:25,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532044230] [2020-09-24 21:43:25,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 21:43:25,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:43:25,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 21:43:25,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-09-24 21:43:25,346 INFO L87 Difference]: Start difference. First operand 1076 states and 1294 transitions. Second operand 19 states. [2020-09-24 21:43:26,059 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-09-24 21:43:26,578 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2020-09-24 21:43:26,903 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 94 [2020-09-24 21:43:28,334 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2020-09-24 21:43:28,658 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 91 [2020-09-24 21:43:30,004 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2020-09-24 21:43:30,403 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 86 [2020-09-24 21:43:31,675 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 72 [2020-09-24 21:43:32,406 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2020-09-24 21:43:34,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:43:34,231 INFO L93 Difference]: Finished difference Result 4103 states and 5490 transitions. [2020-09-24 21:43:34,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-24 21:43:34,232 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 137 [2020-09-24 21:43:34,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:43:34,257 INFO L225 Difference]: With dead ends: 4103 [2020-09-24 21:43:34,257 INFO L226 Difference]: Without dead ends: 3107 [2020-09-24 21:43:34,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=593, Invalid=1477, Unknown=0, NotChecked=0, Total=2070 [2020-09-24 21:43:34,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2020-09-24 21:43:34,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 3029. [2020-09-24 21:43:34,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3029 states. [2020-09-24 21:43:34,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 3673 transitions. [2020-09-24 21:43:34,407 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 3673 transitions. Word has length 137 [2020-09-24 21:43:34,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:43:34,408 INFO L479 AbstractCegarLoop]: Abstraction has 3029 states and 3673 transitions. [2020-09-24 21:43:34,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 21:43:34,410 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 3673 transitions. [2020-09-24 21:43:34,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-09-24 21:43:34,425 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:34,426 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:43:34,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:43:34,427 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:34,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:34,427 INFO L82 PathProgramCache]: Analyzing trace with hash -533236715, now seen corresponding path program 1 times [2020-09-24 21:43:34,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:34,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2121061539] [2020-09-24 21:43:34,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:34,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:34,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:34,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:34,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:35,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:35,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:36,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:36,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:37,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:37,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:38,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:38,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:39,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:39,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-09-24 21:43:39,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-24 21:43:39,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-09-24 21:43:39,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:39,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 21:43:39,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:43:39,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-09-24 21:43:39,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:43:39,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:43:39,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:39,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:39,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:39,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:43:39,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:39,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-09-24 21:43:39,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:39,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:43:39,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:43:39,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:43:39,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:43:39,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:43:39,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:39,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:39,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:40,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:40,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:43:40,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:43:40,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-24 21:43:40,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:40,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:43:40,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:43:40,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:43:40,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:43:40,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 21:43:40,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:40,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:40,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:40,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:40,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:43:40,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:43:40,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-09-24 21:43:40,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:40,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:43:40,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:43:40,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 21:43:40,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:43:40,353 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 21:43:40,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2121061539] [2020-09-24 21:43:40,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:43:40,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 21:43:40,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283823902] [2020-09-24 21:43:40,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 21:43:40,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:43:40,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 21:43:40,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:43:40,356 INFO L87 Difference]: Start difference. First operand 3029 states and 3673 transitions. Second operand 12 states. [2020-09-24 21:43:46,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:43:46,706 INFO L93 Difference]: Finished difference Result 8667 states and 11472 transitions. [2020-09-24 21:43:46,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 21:43:46,708 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 150 [2020-09-24 21:43:46,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:43:46,742 INFO L225 Difference]: With dead ends: 8667 [2020-09-24 21:43:46,743 INFO L226 Difference]: Without dead ends: 5368 [2020-09-24 21:43:46,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2020-09-24 21:43:46,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5368 states. [2020-09-24 21:43:46,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5368 to 4728. [2020-09-24 21:43:46,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4728 states. [2020-09-24 21:43:46,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4728 states to 4728 states and 5857 transitions. [2020-09-24 21:43:46,925 INFO L78 Accepts]: Start accepts. Automaton has 4728 states and 5857 transitions. Word has length 150 [2020-09-24 21:43:46,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:43:46,925 INFO L479 AbstractCegarLoop]: Abstraction has 4728 states and 5857 transitions. [2020-09-24 21:43:46,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 21:43:46,925 INFO L276 IsEmpty]: Start isEmpty. Operand 4728 states and 5857 transitions. [2020-09-24 21:43:46,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-09-24 21:43:46,938 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:46,938 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:43:46,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:43:46,939 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:46,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:46,939 INFO L82 PathProgramCache]: Analyzing trace with hash 840057354, now seen corresponding path program 1 times [2020-09-24 21:43:46,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:46,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347476511] [2020-09-24 21:43:46,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:46,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:47,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:47,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:47,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:47,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:48,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:48,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:49,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:50,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking...